double s=12.345;cout<<s<<endl;//输出原数12.345cout<<setprecision(2);cout<<s<<endl;//输出保留两位有效数字12cout.setf(ios::showpoint);//或者写cout<<setiosflags(ios::showpoint);cout<<s<<endl;//输出保留两位有效数字外加一个小数点12. 3.fixedsetprecision(n)和fixed合用的话可以控制小数点后有...
convertor convert to binary convert to fixed colu convertvt convex-hull approxima convexhull convexity closure convex system conveyance buffer conveyer conveyor belt monitor conviction buy convincing adj convolutional code convolutional coding convolutional decoder convolutional encodin convolution code convolution...
cryptographic hash function:A function that maps an input of any length to a short output bit string of fixed length, such that finding an input that maps to a particular bit string of the correct output length, or even finding two inputs that map to the same output bit string, is compu...
cotton wastes cotton-mouton effect cotton-moutoneffet cotton-paffixed overg cottonblendedfabric cottonpickin cottrellpump cottus czerskii cotyledon ladysoathen couderc cougar club cough hard cough oneself hoarse cough su re ant coughing up blood could afford could arrive theroad could be our only one...
#include<iomanip>// Needed for setprecision std::cout<<std::fixed<<std::setprecision(2) <<123.456<<std::endl; 即使你不介意冗长的所有这一切,而享受的灵活性或表现力,请记住,这种抽象是需要付出代价。首先,固定和 setprecision 机器人是无状态的含义及其影响仍然存在,直到他们是逆转或重置。相比之下...
int precision(int val) 设置精确度为val,控制输出浮点数的有效位,返回旧值。 int precision( ) 返回旧的精确度值。 int width(int val) 设置显示数据的宽度(域宽),返回旧的域宽。 int width( )只返回当前域宽,缺省宽度为0。这时插入操作能按表示数据的最小宽度显示 ...
c/c++语言具备一个不同于其他编程语言的的特性,即支持可变参数。 例如C库中的printf,scanf等函数,都支持输入数量不定的参数。printf函数原型为 int printf(const char *format, …); printf("hello world");///< 1个参数printf("%d", a);///< 2个参数printf("%d, %d", a, b);///< 3个参数 测...
A long standing bug has been fixed where where objects created before a call to _create_as_root would not be properly aligned, and buffer end is now also padded to largest object seen within the buffer. Note that for clang debug builds, -fsanitize=undefined has been added and this may ...
GMP - A C library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating-point numbers. [LGPL3 & GPL2] Klein - A fast, SIMD-optimized C++17 Geometric Algebra library for point, line, and plane projections, intersections, joins, rigid-body motion, and...